Instruction Manual

10 Technical data
BU 0230 GB-2712 71
10.4 Data for the digital inputs
Function
Specification
Input voltage
24 V -37.5 % +25 %, 15  V
High level
V
Low level

Input resistance
~ 9.5 k for the Low level
~ 2.5 k3,5 k
Input capacitance
Input 1 + 4 = 10 nF
Input 2 + 3 = 1.2 nF
Scan time
1 ms
Reaction time
5 ms
Requirements made of OSSDs
 µs

Distance between doubl
Safety integrity level (IEC 61508)
non, the digital inputs do not have SIL capability
Probability of a hazardous failure per
hour
DIN1 and DIN4:
PFH = 786.69 FIT for SK 2x0E in Size 1 to 3
PFH = 811.98 FIT for SK 2x0E in Size 4
PFH = 811.82 FIT for SK 2x5E in Size 1 to 3
DIN2 and DIN3:
PFH = 789.25 FIT for SK 2x0E in Size 1 to 3
PFH = 814.55 FIT for SK 2x0E in Size 4
PFH = 814.39 FIT for SK 2x5E in Size 1 to 3
Proportion of safe failures
DIN1 and DIN4:
SFF = 47.77 % for SK 2x0E in Size 1 to 3
SFF = 53.53 % for SK 2x0E in Size 4
SFF = 53.06 % for SK 2x5E in Size 1 to 3
DIN2 and DIN3:
SFF = 54.39 % for SK 2x0E in Size 1 to 3
SFF = 57.39 % for SK 2x0E in Size 4
SFF = 57.00 % for SK 2x5E in Size 1 to 3
Safety category
(as per to EN ISO 13849-1)
Cat. 1
Performance level
(as per to EN 13849-1)
PL c
The mean time until a hazardous
failure
MTTF
d
= "High" (>100 years)
Diagnostic coverage level
No DC
Lifetime
TM = 20 years